Supply unit



FIG. 1 is a perspective view of a supply unit in accordance with a first embodiment of my new design;

FIGS. 2a and 2b are a bottom plan view in two separate parts of the supply unit;

FIGS. 3a and 3b are a rear elevational view view in two separate parts of the supply unit;

FIG. 4 is a right side elevational view, the left side elevational view being a mirror image thereof;

FIGS. 5a and 5b are a front elevational view in two separate parts of the supply unit; and,

FIGS. 6a and 6b are a top plan view in two separate parts of the supply unit. 

The ornamental design for a supply unit, as shown and described. 